Fix isEmail does not support domain IP address

[ediamin]

Description

Fixes #38105.

Currently the isEmail in @wordpress/url returns false is we use email with domain IP address like ace@204.32.222.14. This PR fixes this issue and add support for the emails using domain IP.

Testing Instructions

import { isEmail } from '@wordpress/url';

console.log( isEmail( 'ace@204.32.222.14' ) ); // Should be return true after applying the fix.

Types of changes

1. Fixes the regular expression that validates the email string.
2. Add an email with domain ip in the test case.

Checklist:

• My code is tested.
• My code follows the WordPress code style.
• My code follows the accessibility standards.
• I've tested my changes with keyboard and screen readers.
• My code has proper inline documentation.
• I've included developer documentation if appropriate.
• I've updated all React Native files affected by any refactorings/renamings in this PR (please manually search all *.native.js files for terms that need renaming or removal).
• I've updated related schemas if appropriate.

[luisherranz]

This will fail for IPs with a single number at the end ace@1.1.1.1 and succeed for incorrect IPs, like one with a number higher than 255 (ace@900.1.1.1), with 4 numbers (ace@1111.1.1.1), or with less or more than 4 sets of numbers (ace@1.1.1, ace@1.1.1.1.1).

Why don't we add a proper IP regex, like ^((1?[1-9]?\d|25[0-5]|2[0-4]\d)\.){3}(1?[1-9]?\d|25[0-5]|2[0-4]\d)$? 🙂